您不需要安装它，只需按照教程并将jQM文件复制到assets / www目录并重建android项目可以容纳phonegap图书馆。

You dont need to install it, just follow the tutorial and copy jQM files into assets/www directory and rebuild android project so it can accommodate to phonegap libraries.

这教程将帮助你学习如何创建一个apk文件，但从你的第二个问题，我想你知道该怎么做。

This tutorial will help you learn how to create an apk file, but from your second question I think you know what to do.

第二个问题慢慢不是做手机，而是因为jQuery手机。它仍然是一个相当缓慢的移动设备的框架。 iPhone 5+是目前***的移动平台的jQM，为Android只有4+版本。查看此图表，它们表示手机浏览器及其桌面版本之间的jQuery性能差异。注意手机和桌面浏览器之间的区别，这是电话间歇缓慢的主要原因。

Regarding your second question slowness is not do to phonegap but because of jQuery mobile. It is still a rather slow framework for mobile devices. iPhone 5+ is currently best mobile platform for jQM, for android only 4+ version. Look at this graphs, they represent jQuery performance differences between mobile phones browsers and their desktop variations. Notice a difference between mobile phones and desktop browsers, that is a main reason for phonegap sluggishness.